388965099 has 4 divisors (see below), whose sum is σ = 518620136. Its totient is φ = 259310064.

The previous prime is 388965089. The next prime is 388965103. The reversal of 388965099 is 990569883.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 388965099 - 2¹⁷ = 388834027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388965019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64827514 + ... + 64827519.

It is an arithmetic number, because the mean of its divisors is an integer number (129655034).

Almost surely, 2^388965099 is an apocalyptic number.

388965099 is a deficient number, since it is larger than the sum of its proper divisors (129655037).

388965099 is a wasteful number, since it uses less digits than its factorization.

388965099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129655036.

The product of its (nonzero) digits is 4199040, while the sum is 57.

The square root of 388965099 is about 19722.1981279978. The cubic root of 388965099 is about 729.9675340537.

The spelling of 388965099 in words is "three hundred eighty-eight million, nine hundred sixty-five thousand, ninety-nine".